97 
this respect between boisduvali and typical arctica Zett. from Greenland; be- 
tween veins 2-5 terminally a large patch of pale yellow extending inwardly 
beyond the subterminal row of round spots, which are scarcely as prominent 
as in boisduvali and are surrounded by more or less pale yellow suffusion, 
Q Very characteristic on upper side, paler than the ¢, the wing suffused 
apically and along costa with greenish yellow; terminal row of spots pale 
yellow, not concolorous as in typical boisduvali @’s, which also lack the pale 
yellow suffusion, presenting no contrasts; underside of secondaries much as in 
é but the yellow suffusion is usually greater and has a distinct greenish tinge; 
the costal spot of the median band is usually white as well as the rather large 
terminal lunules. 
Hapitat. Mt. Ranier, Wash. (July 24-31) (6-7000 ft.) (McDunnough), 
78,72. Types, Coll. Barnes. 
The species was the commonest butterfly collected, being found 
all over the grassy slopes around the so-called Paradise Valley. It re- 
minds one in the greenish yellow suffusion of the @ of the var. ists 
of the European pales. Dr. Dyar evidently refers to this species in 
Proc. Wash. Ent. Soc. V, 129 under the name var. arctica Zett. 
BRENTHIS TRICLARIS Hbn. 
This species as figured by Hubner (Samml. Ex. Schmett. IT, PI. 
232) shows very distinct silver markings on the underside; Moeschler 
(Wien. Ent. Monatsch, IV, 337) applied the name to Labrador spec- 
imens, considering them a racial form of the European aphirape Ochs. 
and making ossianus Bdy. a synonym. He has been following in this 
by the majority of later authorities. The Labrador race, to judge by 
a small series before us, shows considerable tendency to lose the silver 
on the underside, especially in the 8 sex; five specimens from Hymers, 
Ont., and one from Saskatchewan have however very prominent silver 
markings and in this respect approach Hibner’s figure more closely 
than does the Labrador form; our series are however not nearly 
lengthy enough to decide how great the individual variation from each 
locality may be. 
On the strength of Mead’s report (Rep. Wheel. Ex. 5, 756) the 
species has been listed from Colorado; this Colorado form, which is 
quite constant, as far as can be judged from a good series of both sexes 
before us, is noticeably different from our Labrador and Canadian 
specimens of triclaris; The upper side is paler with the black basal 
shading reduced and the black markings narrow and cleanly cut; the 
underside of secondaries resembles that of the type form aphirape 
